CAR Radio Stereo Radio KIT Dash Installation MOUNTING W/Wiring Harness 1982-1991 Buick Cadillac Chevrolet GMC Oldsmobile Pontiac DASH KIT: GM-K121 Single DIN Installation Dash Kit.Metra Equivalent: Metra 99-4500 and Scosche Equivalent: Scosche GM1508B This dash kit allows you to replace your vehicle's factory stereo to improve the overall sound quality of your car audio system. It has been designed with high quality automotive grade ABS plastic to match the texture of your factory dash. Installation of this kit is simple. No special tools are required and the included step-by-step instructions will guide you through the install. WIRE HARNESS: GWH-342 Wire Harness . When replacing your factory radio with an after-market car stereo, a wire harness is a must for a quick installation. It eliminates cutting your OE radio plug helping to maintain your cars value. After connecting it, your install is simple as the wires will color-match and easily connect to the after-market stereo. Without a wiring harness you will have to cut the factory harness and then test each wire to connect to your radio. CUSTOMIZATION:Choose your free air freshener (assorted colors) NOTE: Locate your vehicle in the application guide. Cross-reference your vehicle's make and model to determine which installation parts are required to complete your car stereo installation. The installation parts consist of a Dash Kit, Wire Harness and in some cases an Antenna Adapter is also required.